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Definition of an Oracle DBA?

Hello all, I have a non technical question that kind of puzzled my mind for the last little while. What's a true definition of a senior Oracle DBA? How are they different from intermediate DBA? Years? Age? Resposibility?

If you know the answer to the following questions then you are a nominee for a senior DBA

Regards
Amar

PS: Just kidding dont take it too seriously. These are few things that a seniour DBA must know. So you can judge yourself.

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